ABB Relion 670 Series Technical Reference Manual page 17

Technical reference manual
Input and output signals..................................................................429
Setting parameters..........................................................................430
Technical data.................................................................................435
Sensitive directional residual overcurrent and power protection
SDEPSDE (67N)...................................................................................436
Introduction......................................................................................436
Principle of operation.......................................................................438
Function inputs...........................................................................438
Function block.................................................................................445
Input and output signals..................................................................445
Setting parameters..........................................................................446
Technical data.................................................................................448
Thermal overload protection, one time constant LPTTR......................449
Introduction......................................................................................449
Principle of operation.......................................................................450
Function block.................................................................................454
Input and output signals..................................................................454
Setting parameters..........................................................................455
Technical data.................................................................................456
Breaker failure protection CCRBRF (50BF)..........................................456
Introduction......................................................................................457
Operation principle..........................................................................457
Function block.................................................................................460
Input and output signals..................................................................460
Setting parameters..........................................................................461
Technical data.................................................................................461
Stub protection STBPTOC (50STB).....................................................462
Introduction......................................................................................462
Principle of operation.......................................................................462
Function block.................................................................................463
Input and output signals..................................................................464
Setting parameters..........................................................................464
Technical data.................................................................................465
Pole discrepancy protection CCRPLD (52PD).....................................465
Introduction......................................................................................465
Principle of operation.......................................................................466
Pole discrepancy signaling from circuit breaker.........................468
Unsymmetrical current detection................................................468
Function block.................................................................................469
Input and output signals..................................................................469
Table of contents
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